<https://www.toyotaownersclub.com/forums/topic/207425-cvt-engine-revs-up-to-3k-4k-when-driving-on-a-steep-hille/#comment-1643266>
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"Sorry Yes, I should have made is more clearer. Yes  going down hill. The trouble is when the revs goes up so high all of a sudden,  the control of the car is also somewhat is an issue making you feels like its not in control.\n \n"
<https://www.toyotaownersclub.com/forums/topic/207425-cvt-engine-revs-up-to-3k-4k-when-driving-on-a-steep-hille/>